/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.transforms.reflect;



import com.google.auto.value.AutoValue;

import net.bytebuddy.NamingStrategy;

import net.bytebuddy.description.type.TypeDescription;

import com.bff.gaia.unified.sdk.transforms.DoFn;



import javax.annotation.Nullable;



import static com.bff.gaia.unified.vendor.guava.com.google.common.base.MoreObjects.firstNonNull;



/**

 * A naming strategy for ByteBuddy invokers ({@link DoFnInvoker} and {@link OnTimerInvoker}) that is

 * deterministic and readable. This is correct to use only when a class is created at most once.

 */

@AutoValue

abstract class StableInvokerNamingStrategy extends NamingStrategy.AbstractBase {



  public abstract Class<? extends DoFn<?, ?>> getFnClass();



  @Nullable

  public abstract String getSuffix();



  public static StableInvokerNamingStrategy forDoFnClass(Class<? extends DoFn<?, ?>> fnClass) {

    return new AutoValue_StableInvokerNamingStrategy(fnClass, null);

  }



  public StableInvokerNamingStrategy withSuffix(String newSuffix) {

    return new AutoValue_StableInvokerNamingStrategy(getFnClass(), newSuffix);

  }



  @Override

  protected String name(TypeDescription superClass) {

    return String.format(

        "%s$%s",

        getFnClass().getName(), firstNonNull(getSuffix(), superClass.getName().replace(".", "_")));

  }

}